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Diodes Incorporated AZ1084CS-3.3TRG1
- Part No.:
- AZ1084CS-3.3TRG1
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-263-4, D2PAK (3 Leads + Tab), TO-263AA
- Datasheet:
-
AZ1084CS-3.3TRG1.pdf
- Description:
- IC REG LINEAR 3.3V 5A TO263
- Quantity:
- Payment:
- Shipping:
Inventory:1,592
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Product details
Overview
AZ1084CS-3.3TRG1 from Diodes Incorporated is a fixed-output 3.3V, 5A low-dropout linear regulator in TO252-2 (3) package, featuring 1.35V typical dropout at full load, on-chip thermal limiting, and ±1% output voltage accuracy over 0°C to +125°C junction temperature. It delivers stable post-regulation for switching supplies and powers microprocessor cores in embedded systems requiring high-current, low-noise DC rails.
For engineers reviewing the AZ1084CS-3.3TRG1 datasheet, AZ1084CS-3.3TRG1 pinout, AZ1084CS-3.3TRG1 application, or AZ1084CS-3.3TRG1 equivalent, key selection criteria include dropout voltage at 5A, thermal shutdown behavior under sustained load, compatibility with ceramic output capacitors, and fixed-voltage stability across line/load/temperature variations.
Technical Context
The AZ1084CS-3.3TRG1 implements a bandgap-referenced error amplifier driving a PNP pass transistor, enabling low dropout operation while maintaining 0.5% typical load regulation and 0.5mV typical line regulation. Its internal current limit is set at 6.5A and thermal shutdown activates at +150°C junction temperature.
It operates with input voltages up to 12V and requires only 10µF ceramic input/output capacitance for stability. The device supports minimum load current as low as 3mA and exhibits 72dB PSRR at 120Hz, making it suitable for noise-sensitive analog and digital supply domains.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3V ±1% (3.234V–3.366V) ensures reliable logic-level compliance for 3.3V microcontrollers and FPGAs. |
| Max Output Current | 5A continuous delivery enables single-regulator power for high-performance SoCs and DDR memory subsystems. |
| Dropout Voltage | 1.35V typical at 5A allows operation from 4.65V input - critical for battery-powered 5V-to-3.3V conversion. |
| Thermal Shutdown | Activates at +150°C junction temperature, protecting against sustained overload or poor heatsinking. |
| PSRR @ 120Hz | 72dB attenuation of ripple from upstream switching converters reduces downstream filtering requirements. |
| Load Regulation | 7mV max deviation (0–5A) maintains tight voltage control during CPU burst loads. |
| Line Regulation | 1mV max deviation (4.8–10V input) ensures stability across wide input rail tolerances. |
Pinout & Package
Package: TO252-2 (3), surface-mount, thermally enhanced DPAK variant with exposed drain pad for PCB heat sinking. Dimensions: 6.7mm × 10.4mm × 2.38mm (L × W × H).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (INPUT) | Unregulated input supply connection | Accepts 4.8V–12V DC; must be decoupled with ≥10µF ceramic capacitor near pin. |
| 2 (OUTPUT) | Regulated 3.3V output node | Delivers up to 5A; requires low-ESR ceramic capacitor (≥10µF) directly at pin for stability. |
| 3 (GND) | Power ground reference | Common return path for input/output currents; connects to thermal pad for optimal heat dissipation. |
Key Features
| Feature | Design Value |
|---|---|
| Low ESR capacitor support | Stable with ≥10µF ceramic output caps - eliminates need for bulk tantalum or electrolytic. |
| Integrated thermal protection | Automatic shutdown at +150°C junction temperature prevents permanent die damage under fault conditions. |
| Trimmed bandgap reference | 1.225V–1.270V reference ensures ±1% output accuracy without external calibration. |
| Current limiting | 6.5A foldback limit protects both regulator and downstream circuitry during short-circuit events. |
| Lead-free & RoHS compliant | Fully compliant with EU RoHS 3 (2015/863/EU); halogen- and antimony-free "Green" construction. |
Applications
| Microprocessor Core Supply | Battery Charger Post-Regulation |
|---|---|
|
Use Scenario: Powers ARM Cortex-A series or RISC-V SoC core rails in industrial gateways. IC Role / Device Role / Timing Role: Primary 3.3V domain regulator delivering clean, low-noise power to CPU VDD_IO and PLL supply pins. Use Value: 72dB PSRR suppresses switching noise from upstream DC/DC, preventing timing jitter in high-speed interfaces. |
Use Scenario: Final-stage regulation after buck converter in Li-ion fast-charger designs. IC Role / Device Role / Timing Role: Precision 3.3V bias supply for charger IC analog blocks and USB-PD controller logic. Use Value: ±1% output tolerance ensures accurate ADC reference and precise charge termination voltage sensing. |
| Desktop PC Standby Rail | Embedded FPGA I/O Bank Supply |
|
Use Scenario: Generates always-on 3.3VSB rail in ATX-compliant desktop motherboards. IC Role / Device Role / Timing Role: Low-quiescent-current (5mA typ) LDO supplying RTC, SMBus, and wake-on-LAN circuitry. Use Value: 1.35V dropout enables operation from 4.65V standby bus - extends functional margin below nominal 5VSB. |
Use Scenario: Powers configurable I/O banks in Xilinx Artix-7 or Intel MAX 10 FPGAs. IC Role / Device Role / Timing Role: Dedicated 3.3V rail for LVCMOS33 I/O standards with fast transient response. Use Value: 7mV load regulation minimizes voltage droop during simultaneous I/O switching, preserving signal integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fixed-output LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AP1117-3.3TSG-13 | 1A output, 1.3V dropout at 1A, SOT-223 package | Limited to low-power peripherals; insufficient for 5A SoC rails | Select when board space is constrained and load current ≤1A. |
| LT1963AES8-3.3#TRPBF | 1.5A output, 340mV dropout at 1.5A, SO-8 package, higher cost | Better PSRR (78dB) but lower current rating and no thermal pad | Choose for ultra-low-noise analog subsystems where 5A is not required. |
Compared with AP1117-3.3TSG-13 and LT1963AES8-3.3#TRPBF, the AZ1084CS-3.3TRG1 uniquely combines 5A capability, TO252 thermal performance, and 3.3V fixed output in a cost-optimized industrial-grade package - making it the only viable option for high-current embedded processor supplies requiring <1.5V dropout.
Availability
AZ1084CS-3.3TRG1 is available at Aetrix Electronics and suitable for microprocessor core supplies, battery charger post-regulation, and FPGA I/O bank powering requiring stable component supply, long-lifecycle support, and RoHS-compliant manufacturing.
Supply support for AZ1084CS-3.3TRG1 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, specializing in power management, signal integrity, and protection solutions for industrial, computing, and consumer markets.
The AZ1084C series belongs to Diodes' high-current LDO portfolio, engineered specifically for post-regulation in power-constrained embedded systems where thermal efficiency and output precision are critical.
FAQ
What is the maximum allowable input voltage for AZ1084CS-3.3TRG1?
The absolute maximum input voltage is 13.2V, but recommended operating input voltage is limited to 12V per datasheet specifications. Exceeding 12V risks exceeding thermal limits under full 5A load, especially without adequate heatsinking. Operation above 12V is not guaranteed for reliability or lifetime.
Can AZ1084CS-3.3TRG1 operate without an output capacitor?
No - a minimum 10µF ceramic output capacitor is required for stability, as confirmed in the datasheet's Typical Applications Circuit and Electrical Characteristics tables. Omitting it causes oscillation and potential damage due to phase margin loss in the control loop.
Does AZ1084CS-3.3TRG1 require a minimum load current to maintain regulation?
Yes - the datasheet specifies a minimum load current of 3mA at +125°C junction temperature. Below this, output voltage may rise beyond 3.366V due to internal bias current effects; this is verified in the "Minimum Load Current vs. Junction Temperature" graph on page 6.
Is AZ1084CS-3.3TRG1 qualified for automotive applications?
No - AZ1084CS-3.3TRG1 is rated for 0°C to +125°C operating junction temperature but is not AEC-Q100 qualified. Diodes offers automotive-grade variants (e.g., AZ1084CD-3.3TRG1 with PPAP support) for qualified applications; this part is intended for industrial and commercial use only.
AZ1084CS-3.3TRG1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-263-4, D2PAK (3 Leads + Tab), TO-263AA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 12V
- Voltage - Output (Min/Fixed):
- 3.3V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 1.5V @ 4.5A
- Current - Output:
- 5A
- Current - Quiescent (Iq):
- 10 mA
- Current - Supply (Max):
- -
- PSRR:
- 72dB (120Hz)
- Control Features:
- -
- Protection Features:
- Over Current, Over Temperature
- Operating Temperature:
- 0°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-263
AZ1084CS-3.3TRG1 FAQ
1.How can I place an order for AZ1084CS-3.3TRG1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AZ1084CS-3.3TRG1 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for AZ1084CS-3.3TRG1 reliable?
The price and inventory of AZ1084CS-3.3TRG1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AZ1084CS-3.3TRG1 is usually 5 days.
3.What payment methods are accepted for AZ1084CS-3.3TRG1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AZ1084CS-3.3TRG1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AZ1084CS-3.3TRG1?
AZ1084CS-3.3TRG1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AZ1084CS-3.3TRG1 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for AZ1084CS-3.3TRG1?
For technical support, including AZ1084CS-3.3TRG1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AZ1084CS-3.3TRG1 requirements.
6.How does Aetrix verify that AZ1084CS-3.3TRG1 is sourced from the original manufacturer or authorized distributors?
All AZ1084CS-3.3TRG1 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that AZ1084CS-3.3TRG1 meets industry standards.
7.What is the process for return or replacement of AZ1084CS-3.3TRG1?
All AZ1084CS-3.3TRG1 units undergo pre-shipment inspection (PSI). If there is an issue with AZ1084CS-3.3TRG1, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The AZ1084CS-3.3TRG1 part is unused and in its original packaging.
Return procedure for AZ1084CS-3.3TRG1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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